Altech Netstar Tracker / Wrongful deduction on my account

Altech netstar has deducted from my bank account and I do not have tracker in my car. They say its for a car I sold over 1 year ago which I cancelled in the same month of selling the car in June 2014 and in that same month the tracker was also cancelled. BUT after 1 year they start deducting again using another registration number. I am not happy they they have went into my bank account and took my money. Email: lass.gov@vodamail.co.za